686594982 has 16 divisors (see below), whose sum is σ = 1445463360. Its totient is φ = 216819432.

The previous prime is 686594959. The next prime is 686594983. The reversal of 686594982 is 289495686.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686594983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3011268 + ... + 3011495.

It is an arithmetic number, because the mean of its divisors is an integer number (90341460).

Almost surely, 2^686594982 is an apocalyptic number.

686594982 is an abundant number, since it is smaller than the sum of its proper divisors (758868378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

686594982 is a wasteful number, since it uses less digits than its factorization.

686594982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6022787.

The product of its digits is 7464960, while the sum is 57.

The square root of 686594982 is about 26202.9575048314. The cubic root of 686594982 is about 882.1996375547.

The spelling of 686594982 in words is "six hundred eighty-six million, five hundred ninety-four thousand, nine hundred eighty-two".